Ran my normal backup script which backed up and tested fine.
Ran it again and there was a long delay before things seemed to happen. Tested the archive and it was corrupt (first time ever that has happened to me). Lots of CRC Errors.

Been testing things and I noticed that if I select Overwrite previous file (I don’t usually select that) Then I can run the backup time after time and no error. But If I deselect Overwrite option, then it’s back to the errors again.

I only have 1 other older script that I could test and it is only 1 folder with a couple of sub-folders and not very large, no error on that one.

So I made a new backup of a couple of folders, ran it, tested it. Ran it again and tested it and it was fine. Another new backup a couple of folders now with the addition of a few files. ran it and tested it. Ran it again and tested it all was fine.

Thought that maybe it was just a problem with an old script, so just made a new backup same files and folders as my old one.

Ran it, tested it all fine. Ran it and tested again. Corrupt archive once again.

Started to remove files and folders 1 by 1 and ran and tested after each was removed. Same results. It was only after I removed a folder from C:\Users\Username\AppData\Local\VirtualStore\Program Files that I could keep running the backup without errors.

Edited my old script and removed that folder from it and it works time and again.

I think I have found a bug.

Edit: Scratch all that I have obviously spent too long on trying solve this and boobed. When I removed the folder from C:\Users\Username\AppData\Local\VirtualStore\Program Files from my backup I must have checked the Overwrite previous file again.

Coming back to it now and trying again even with the VirtualStore\Program Files folder removed I am getting a corrupted archive.

I am wondering now if it is a size of archive problem.
That will have to wait until tomorrow before I can start testing that.

or do you think it is due to number of folders you added to the list? what if you add one folder with many subfolders?

I was beginning to think that way Spywolf, but as you can see from the results above there was one with 105 files & 13 dirs that worked. One with 86 files & 22 dirs that failed. The last one 1062 files & 27 dirs that failed. So fairly mixed with differing results.

Ran, extracted. Ran again tried to extract. this time it took me straight to this screen asking for my password.
You can see in the screen shot just below where it says “Current File” that it is going to be full of errors anyway as it’s all strange symbols.

Entered a password any way.
Message: Error the password is incorrect.
Hit cancel, used my normal password again and it extracted but result just like screen shot 6 in the previous post.

Made another new backup this time encrypted with a password. Same result.

Even though I had set a password I still got the Message: Error the password is incorrect.
Hit cancel, retried password and it extracted to the same corrupt files.